ics1889 Holt Integrated Circuits, Inc., ics1889 Datasheet - Page 8

• Manufacturer Part Number: ics1889
• Description: 100base-fx Integrated Phyceivertm
• Manufacturer: Holt Integrated Circuits, Inc.

BIT
15 Reset
14 Loop Back
13 Data Rate
12 Auto-Negotiate Enable
11
10 Isolate
9
8
7
6
5
4
3
2
1
0
Power-Down
Restart Auto-Negotitation No Effect
Duplex Mode
Collision Test
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Function
No Effect
No Effect
No Effect
Disable loop back mode
Always set to a logic one 100 Mpbs operation
No Effect
Normal Mode
Half Duplex
If read, bits 0-6 and bits 9 and 12 will return logic
zeroes and bit 13 will return a logic one.
Writes to these bits will have no effect.
Effect when bit = 0
Reset PHY
Enable loop back mode
Always set to logic zero
Reduced power consumption
Isolate PHY from MII
Always set to logic zero
Full Duplex
Enable collision signal test
Effect when bit = 1
RW/SC
Access
RW
RW
RW
RW
RW
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Address=0
0 if PHY
1 if PHY
Address
Default
< >0,
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0